DS9107+ - Waterproof iButton Capsule

A: Thank you for the inquiry Gabriel. The DS9107+ would be suitable for protecting the iButton from water ingress. The DS9107+ will also be helpful in setting the depth of the data logger. The lid has a notch that can be used to clamp onto a cable. The picture below is an example:





In regards to accuracy, it is dependent on the logger model, but the DS9107+ will slow the loggers thermal response to 150 seconds. I'd suggest considering the following models:

• DS1921G - ±1.0°C (-30 to 70°C)


• DS1922L - ±0.5°C (-10 to 65°C)


• DS1925 - ±0.5°C (-40°C to +85°C)

Answer provided by:  David Cooley (4/11/2019)

A: Thank you for the inquiry. There isn't a reason you couldn't use the DS1923 in the iButton capsule for monitoring temperature only. The DS1923's temperature accuracy would not be affected by the DS9107. However, the DS9107 does slow the thermal response of the Thermochrons/Hygrochron by 150 seconds. You'd want to disable the humidity logging for the mission. Since, the humidity readings increase battery consumption, takes up memory capacity, and have no value within a DS9107. I wouldn't really suggest purchasing the DS1923 to be used in the DS9107 unless you know you have applications that will require humidity logging. To monitor temperature in a DS9107 with a ±0.5°C accuracy, I'd favor the DS1922L, DS1922T, or DS1925 over the DS1923. Answer provided by:  David Cooley (12/10/2019)

A: Thank you for the inquiry. A Thermochron in the DS9107+ will typically have a thermal response of 150 seconds. Per the DS9107+ data sheet, "the thermal response was derived from submerging an iButton capsule with DS1922T inside into 55°C water. The initial temperature of iButton and capsule was 23.5°C. Without capsule, the response time constant is approximately 30s."

The DS9107+ is not intended to be used in humidity sensing applications. Since, it prevents air moisture from entering the enclosure. So, humidity readings from the DS1923 in the DS9107+ should be disregarded. Answer provided by:  David Cooley (4/10/2024)